*{
    margin: 0;
    padding: 0;
}
body{
    background-color: grey;
    background-size: 100%;
}
.center{
    position: relative;
    width: 60%;
    clear: both;
    margin: 0 auto;
    top: 100px;
    background-color: white;
    height: auto;
    border-radius: 5%;
    opacity: 0.6;
}
.center:hover{
    opacity: 0.9;
}
.center>span{
    display: block;
    position: relative;
    top: 20px;
    margin: 0 auto;
    width: 100%;
    text-align: center;
    font-size: 30px;
}
.center>ul{
    margin-top: 50px;
    list-style: none;
    padding: 0;
    margin-left: 50px;
}
.center>ul>li:last-child{
    padding-bottom: 80px;
}
.center>ul>li{
    width: 90%;
    padding-bottom: 30px;
    border: 1px solid black;
}
.center>ul>li>p{
    margin-bottom: 20px;
}
.center>ul>li>input{
    margin-left: 5%;
    margin-bottom: 20px;
}
.center>ul>li>textarea{
    margin-left: 5%;
}

#tijiao{
    position: relative;
    bottom: 30px;
    display: block;
    margin: 0 auto;
    width: 10%;
    height: 30px;
    line-height: 30px;
    border: 0 ;
    border-radius: 5%;
    cursor: pointer;
    margin-top: 20px;
}
#add{
    position: relative;
    bottom: 30px;
    display: block;
    margin: 0 auto;
    width: 10%;
    height: 30px;
    line-height: 30px;
    border: 0 ;
    border-radius: 5%;
    cursor: pointer;
    margin-top: 80px;
}
#tijiao:hover{
    background-color: antiquewhite;
}
#add:hover{
    background-color: antiquewhite;
}
.upquestion{
    border: none;
    width: 10%;
    height: 30px;
    line-height: 30px;
}
.upquestion:hover{
    background-color: antiquewhite;
}
.qtittle{
    margin-top: 20px;
}
.up{
	position:relative;
	display:block;
	top:30px;
    border: 1px solid black;
    margin-top:20px;
}
.up>input{
	width:20%;
	height:30px;
	margin-left:30px;
	margin-top:20px;
}
.center>ul>li>p{
	text-align:center;
	font-size:20px;
}
.upquestion{
	display:block !important;
	margin:0 auto !important;
	margin-top 40px !important;
}
.up{
	display:none;
}
.show:hover .up{
	display:block;
}